package cn.fay.chapter18;

import java.io.File;
import java.io.FilenameFilter;
import java.util.Arrays;
import java.util.regex.Pattern;

public class DirList {
	public static void main(final String[] args) {
		File path=new File(".");
		String[] list;
		if (args.length==0) {
			list=path.list();
		} else {
			list=path.list(new FilenameFilter() {
				private Pattern pattern=Pattern.compile(args[0]);
				public boolean accept(File dir, String name) {
					return pattern.matcher(name).matches();
				}
			});
		}
		Arrays.sort(list,String.CASE_INSENSITIVE_ORDER);
		for (String dirItem : list) {
			System.out.println(dirItem);
		}
	}
}